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(Unicode C) Verify XML Signature having KeyInfo / X509Data / X509IssuerSerialThis example demonstrates how to verify an XML Digital Signature where the KeyInfo element contains an X509Data element,
#include <C_CkHttpW.h> #include <C_CkStringBuilderW.h> #include <C_CkXmlCertVaultW.h> #include <C_CkXmlDSigW.h> void ChilkatSample(void) { const wchar_t *signedSoapXmlUrl; HCkHttpW http; HCkStringBuilderW sbXml; BOOL success; HCkStringBuilderW sbCertPem; HCkXmlCertVaultW certVault; HCkXmlDSigW verifier; BOOL bVerified; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // The SOAP XML with digital signature verified in this example is available at // https://www.chilkatsoft.com/exampleData/sigWithX509IssuerSerial.xml signedSoapXmlUrl = L"https://www.chilkatsoft.com/exampleData/sigWithX509IssuerSerial.xml"; // First, let's get the signed SOAP XML.. http = CkHttpW_Create(); sbXml = CkStringBuilderW_Create(); success = CkHttpW_QuickGetSb(http,signedSoapXmlUrl,sbXml); if (success != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); return; } // The signed XML downloaded from the above URL contains the following. // <?xml version="1.0" encoding="UTF-8" standalone="no" ?> // <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> // <SOAP-ENV:Header> // <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1"><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"><InclusiveNamespaces xmlns="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="wsse SOAP-ENV"/></ds:CanonicalizationMethod><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/><ds:Reference URI="#Body"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><ds:DigestValue>PIiVPpuMc1jGpWaL8ftzTOcc4gc=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>Rlta8LplnFH0q8L+UeVmh4Smdn6oVETi4RoUmpT/KQX3RNAIOdCVE3b7gjmx5+3vp3DhjphOsZvW6dXzkI46xt9pD5otp3b/ZppGqKzltggo9gyQtPvJ8ltJZqVKYOGo5uElRFF/xm/zcx5Y3E14t+LYVSlv2lbem/zZ5zQ7ai8DmGD33id7nGu+MXVwb3kGkJFYoB/GOXtwsep+bcilMglTp8/7SBfBaVFKxWVBp4N2NW7bGlyDct8FaCk9hXQDNm/kqne9GU87tgh8/rbsFCYgyqIRMIvMPvhRWr2EKdEKyLtlZ8w0KYJYpgsf4T7SDghemzXkJoJPrfUQmHudIw==</ds:SignatureValue><ds:KeyInfo><ds:X509Data><ds:X509IssuerSerial><ds:X509IssuerName>CN=Test Company, C=AU, ST=Some-State, O=Internet Widgits Pty Ltd</ds:X509IssuerName><ds:X509SerialNumber>00</ds:X509SerialNumber></ds:X509IssuerSerial></ds:X509Data></ds:KeyInfo></ds:Signature></wsse:Security> // </SOAP-ENV:Header> // <SOAP-ENV:Body xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" SOAP-SEC:id="Body"> // <z:FooBar xmlns:z="http://example.com" /> // </SOAP-ENV:Body> // </SOAP-ENV:Envelope> // // Note: We don't have everything we need to verify the signature. // The KeyInfo part of the Signature contains only the issuer's distinguished name (DN) // and the signing cert's serial number. We must obtain the certificate locally using // this information. // // On a Windows system, if the matching certificate is already installed in the registry-based // certificate stores, then your application does not need to do anything. Chilkat will automatically // locate and use the matching certificate installed on the Windows system. // // This example will assume we're not on a Windows system, or that the matching certificate // is not already installed on the system. // // One strategy for providing certificates to the application doing the XML signature verification // is to load all possible certificates into an in-memory XmlCertVault beforehand, and then call // UseCertVault to allow for Chilkat to automatically find the matching cert from the pre-loaded certificates. // We'll do that here with the one certificate that we already know is the matching certificate. sbCertPem = CkStringBuilderW_Create(); success = CkHttpW_QuickGetSb(http,L"https://chilkatdownload.com/example_data/testcertificate.pem",sbCertPem); if (success != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkStringBuilderW_Dispose(sbCertPem); return; } // Create a cert vault and add the certificates. // In this example, we're only adding a single certificate. An application // could load many certificates into the cert vault.. certVault = CkXmlCertVaultW_Create(); success = CkXmlCertVaultW_AddCertString(certVault,CkStringBuilderW_getAsString(sbCertPem)); if (success != TRUE) { wprintf(L"%s\n",CkXmlCertVaultW_lastErrorText(certVault)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkStringBuilderW_Dispose(sbCertPem); CkXmlCertVaultW_Dispose(certVault); return; } verifier = CkXmlDSigW_Create(); // Tell the verifier to use the certVault as a source for locating // matching certificates. CkXmlDSigW_UseCertVault(verifier,certVault); success = CkXmlDSigW_LoadSignatureSb(verifier,sbXml); if (success != TRUE) { wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkStringBuilderW_Dispose(sbCertPem); CkXmlCertVaultW_Dispose(certVault); CkXmlDSigW_Dispose(verifier); return; } bVerified = CkXmlDSigW_VerifySignature(verifier,TRUE); if (bVerified != TRUE) { wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkStringBuilderW_Dispose(sbCertPem); CkXmlCertVaultW_Dispose(certVault); CkXmlDSigW_Dispose(verifier); return; } wprintf(L"Signature verified!\n"); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkStringBuilderW_Dispose(sbCertPem); CkXmlCertVaultW_Dispose(certVault); CkXmlDSigW_Dispose(verifier); } |
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